Signal processing method and apparatus

A signal processing apparatus, comprising:

• at least one processor;
• one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to:
• determine a first sequence {x(n)} based on a preset condition, wherein the preset condition is
• x
• n
• =
• A
• ·
• e
• j
• ×
• π
• ×
• s
• n
• 8
• ,
• wherein a length of the first sequence is K=6, A is a non-zero complex number, and j=√{square root over (−1)}, and wherein a sequence {s(n)} is {7, 5, −1, −7, −3, 1};
• and
• generate a reference signal of a first signal, wherein the first signal is a signal modulated by using π/2 binary phase shift keying (BPSK), and the reference signal is generated by using the first sequence;
• and
• a transceiver, the transceiver configured to send the reference signal on a first frequency-domain resource, wherein the first frequency-domain resource comprises K subcarriers each having a subcarrier number of k, and
• k=u+L×n+delta,
• wherein L is an integer greater than or equal to 2, delta∈{0, 1, . . . , L−1}, u is an integer, and subcarrier numbers of the K subcarriers are numbered in ascending or descending order of frequencies.

A non-transitory computer-readable storage medium comprising instructions which, when executed by at least one processor, cause the at least one processor to perform operations comprising:

• determining a first sequence {x(n)} based on a preset condition, wherein the preset condition is
• x
• n
• =
• A
• ·
• e
• j
• ×
• π
• ×
• s
• n
• 8
• ,
• wherein a length of the first sequence is K=6, A is a non-zero complex number, and j=√{square root over (−1)}, and wherein a sequence {s(n)} is {7, 5, −1, −7, −3, 1};
• generating a reference signal of a first signal, wherein the first signal is a signal modulated by using π/2 binary phase shift keying (BPSK), and the reference signal is generated by using the first sequence;
• and
• sending the reference signal on a first frequency-domain resource, wherein the first frequency-domain resource comprises K subcarriers each having a subcarrier number of k, and
• k=u+L×n+delta,
• wherein L is an integer greater than or equal to 2, delta∈{0, 1, . . . , L−1}, u is an integer, and subcarrier numbers of the K subcarriers are numbered in ascending or descending order of frequencies.

A signal processing method, comprising:

• generating a local sequence, wherein the local sequence is a first sequence {x(n)} or a conjugate transpose of the first sequence, the local sequence is used to process a first signal, and the first signal is a signal modulated by using π/2 binary phase shift keying (BPSK), wherein the first sequence {x(n)} meets a preset condition xn=y(n+m)mod K,
• y
• n
• =
• A
• ·
• e
• j
• ×
• π
• ×
• s
• n
• 8
• ,
• wherein M∈{0, 1, 2, . . . , 5}, a length of the first sequence is K=6, A is a non-zero complex number, and j=√{square root over (−1)}, and wherein a sequence {s(n)} comprises at least one of the following sequences:
• {1, −3, 1, 5, −1, 3}, {1, −3, 1, −7, 7, −5}, {1, 5, 1, −5, −1, −3}, {1, 5, 1, −3, 1, 5}, {1, 7, 1, −5, −7, −1}, {1, 5, 1, 5, −5, 5}, {1, 5, 1, −1, 3, 7}, {1, −3, 1, −5, −1, 3}, {1, −3, 1, 5, 3, 7}, {1, 5, 3, 7, −1, −5};
• and
• receiving a reference signal of the first signal on a first frequency-domain resource, wherein the first frequency-domain resource comprises K subcarriers each having a subcarrier number of k, k=u+L×n+delta, n=0, 1, . . . , K−1, L is an integer greater than or equal to 2, delta∈{0, 1, . . . , L−1}, u is an integer, the subcarrier numbers are numbered in ascending or descending order of frequencies, and the reference signal is generated by using the first sequence, and wherein the first sequence varies as a value of the delta varies.